Search Results
Results 351 - 400 of 1163
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Toledo Nair S G - - 2006
OBJECTIVE: The purpose of this study was to evaluate the correlation between the radiographic and ultrasonographic measurements of craniocaudal displacement of the left hemidiaphragm. METHODS: Forty-nine patients with clinical indications for interventional procedures prospectively underwent radiographic evaluation of left hemidiaphragmatic mobility and B-mode ultrasonographic measurement of craniocaudal displacement of the ...
Burwell R G - - 2006
In the search to understand the etiology and pathogenesis of adolescent idiopathic scoliosis (AIS) some workers have focused on mechanisms initiated in embryonic life including a disturbance of bilateral (left-right or mirror-image) symmetry highly conserved in vertebrates. The normal external bilateral symmetry of vertebrates results from a default process involving ...
Naqvi Tasneem Z - - 2006
Echocardiography plays an integral role in the diagnosis of congestive heart failure including measurement of left heart pressure as well as mechanical dyssynchrony. In this report we describe novel therapeutic uses of echo pulsed wave Doppler in atrioventricular pacemaker optimization in patients who had either not derived significant symptomatic benefit ...
Abolhassani Niki N Canadian Surg. Technol. & Adv. Robotics, London, - - 2006
Accurate needle insertion into soft, inhomogeneous tissue is of practical interest because of its importance in percutaneous diagnosis and therapies. The needles used in such procedures are usually long flexible needles with bevel tips that can deflect during insertion. Deflection of the needle can not only cause misplacement of the ...
Jiang Shiqin S Sch. of Electron. & Inf. Eng., Tongji Univ., - - 2006
By studying the chaos attractor of cardiac magnetic induction strength B(z) generated by the electrical activity of the heart, we found that its projection in the reconstructed phase space has a similar shape with the map of the total current dipole vector. It is worth noting that the map of ...
Biagini Elena - - 2005
PURPOSE: Noninvasive pacemaker stress echocardiography is a newly introduced method for the diagnosis of coronary artery disease in patients with a permanent pacemaker. The prognostic value of pacemaker stress echocardiography has not been studied. SUBJECTS AND METHODS: We studied 136 patients (mean age 64+/-12 years) with a permanent pacemaker who ...
Kussman Barry D - - 2005
BACKGROUND: Anesthesia for patients with complete heart block can be associated with significant hemodynamic instability. The aim of this study is to review our anesthetic experience of neonates with congenital complete heart block (CCHB) who underwent placement of either a temporary epicardial pacing system or a permanent epicardial pacemaker. METHODS: ...
Omi Wataru - - 2006
Swallow syncope is a relatively rare syndrome that is treatable when diagnosed. A 66-year-old woman was referred to the department of cardiology because she had been suffering from recurrent syncopal attacks associated with swallowing. An ambulatory electrocardiogram revealed atrial and ventricular asystoles immediately after swallowing soup or tea that were ...
Kahloon Mansha U - - 2005
Hyperkalemia is a life threatening metabolic condition. The common risk factors for hyperkalemia include renal insufficiency, use of angiotensin converting enzyme inhibitors, potassium supplementation and excessive consumption of potassium containing diet. A mild to moderate increase in serum potassium causes an increase in myocardial excitability, but further increase leads to ...
Zechmeister H G - - 2005
Sixty moss samples were taken along transects of nine roads in Austria. The concentrations of 17 elements in four moss species were determined. There was a high correlation between several elements like Cu/Sb (0.906), Ni/Co (0.897) or Cr/V (0.898), indicating a common traffic-related source. Enrichment factors were calculated, showing highest ...
Flowers Robert S RS Plastic Surgery Center of the Pacific, Honolulu, Hawaii, - - 2005
This article describes a poorly understood yet clinically significant eyelid structure the authors have labeled the tarsal strap. The tarsal strap anchors the tarsus to the periosteum of the inferolateral orbit. Releasing this tethering band is the cornerstone of achieving lasting, superior surgical results during lateral canthopexy and periorbital restoration ...
McKelvie Jennifer R - - 2005
In situ biodegradation of benzene, toluene, and xylenes in a petroleum hydrocarbon contaminated aquifer near Fairbanks, Alaska was assessed using carbon and hydrogen compound specific isotope analysis (CSIA) of benzene and toluene and analysis of signature metabolites for toluene (benzylsuccinate) and xylenes (methylbenzylsuccinates). Carbon and hydrogen isotope ratios of benzene ...
Eitam Avi - - 2005
Priority effects, i.e., effects of an early cohort on the performance of a later cohort, are generally studied between, and not within, species. The paucity of intraspecific assessments does not reflect a lack of ecological importance, but the technical problem associated with differentiating between conspecific cohorts. Here, we examine priority ...
Bakir Ihsan - - 2005
We present the case of a 61-year-old man with a history of pacemaker implantation 15 years ago. The patient was admitted with chronic swelling of the right hemithorax and inflammation of the old incision scar after the replacement of pacemaker generator 6 years ago. The patient also presented symptoms and ...
Hucker William J - - 2005
In the normal heart, the atrioventricular node (AVN) is part of the sole pathway between the atria and ventricles, and is responsible for the appropriate atrial-ventricular delay. Under normal physiological conditions, the AVN controls appropriate frequency-dependent delay of contractions. The AVN also plays an important role in pathology: it protects ...
Li Huagui - - 2005
Patients who have pacemakers and sinus node dysfunction frequently have atrial fibrillation (AF). The need for continued pacemaker therapy after conversion to permanent AF remains uncertain. This study showed that, among 174 patients who received pacemaker implantation for sinus node dysfunction, 38% (n = 62) had the minimum intrinsic ventricular ...
Ogano Michio - - 2005
We report a patient with cardiac involvement associated with primary amyloidosis presenting marked left ventricular (LV) wall thickening, severely decreased systolic and diastolic function, and complete atrioventricular block (CAVB), who died suddenly of cardiac arrest caused by electro-mechanical uncoupling occurring immediately after permanent pacemaker implantation. Post mortem examination showed no ...
Padeletti Luigi - - 2005
Proper functioning of a pacemaker depends exclusively on the detection of intrinsic cardiac signals. Conventional devices merely establish the presence of an endocavitary potential, but do not evaluate it qualitatively. The recent incorporation of digital signal processing of sensed events in pacemaker permits diagnostic characterization heretofore impossible. METHODS: Digital processing ...
Dulcis Davide - - 2005
The heartbeat of adult Drosophila melanogaster displays two cardiac phases, the anterograde and retrograde beat, which occur in cyclic alternation. Previous work demonstrated that the abdominal heart becomes segmentally innervated during metamorphosis by peripheral neurons that express crustacean cardioactive peptide (CCAP). CCAP has a cardioacceleratory effect when it is applied ...
Seckin B - - 2005
A 21-y-old man applied to hospital with a complaint of erectile dysfunction, which started soon after a gunshot injury. The entry of the bullet was at the middle right gluteal region without any exit hole. A pelvic X-ray revealed the bullet and the scattered particles. On penile Doppler ultrasonography, the ...
Sperzel Johannes - - 2005
BACKGROUND: This study was conducted to evaluate the clinical performance of the ventricular automatic capture feature as implemented in the Insignia I Ultra pacemaker system (Guidant) utilizing a variety of ventricular leads. Currently, the optimal programming of the pacemaker output considers both pacemaker efficiency (prolonging battery longevity) and patient safety ...
Takenaka Sou - - 2005
A 69-year-old female suffering from third-degree atrioventricular block with syncope underwent permanent pacemaker implantation. However, she developed shortness of breath 2 months after the implantation. Blood tests revealed elevated levels of LDH, CRP, BNP, and SIL-2R. Transthoracic echocardiography showed thickened left and right atrial walls with mild pericardial effusion. A ...
Pokrovskii Vladimir M - - 2006
Along with the existence of an intracardiac pacemaker a generator of cardiac rhythm exists in the central nervous system - in the efferent structures of the cardiovascular center of the medullar oblongata. Neural signals originating there in the form of bursts of impulses conduct to the heart along the vagus ...
Fischer Russell J - - 2006
A new measure of heart rate variability is proposed to investigate the interaction of the sino-atrial (SA) and atrio-ventricular (AV) pacemakers. Using electrocardiogram (ECG) fiduciary markers corresponding to the depolarization time of the SA and AV pacemakers, the variability of SA and AV depolarization rate is jointly analyzed by spectral ...
Bonvini Robert F - - 2005
Pacemakers are used more and more in modern cardiology, because of the increasing age of patients and the increasing number of cases of congestive heart failure treated with biventricular stimulation. Twelve lead ECG traces of electro-stimulated patients normally can be interpreted correctly, but in emergency circumstances where only a three ...
Petrie Jean-Paul - - 2005
Transvenous cardiac pacing is a commonly employed treatment for symptomatic bradyarrhythmias in dogs. Medical management of these conditions has not proven to be successful leaving pacing as the only viable alternative. The technique of pacemaker implantation is not difficult, but successful pacemaker therapy requires an understanding of electrophysiology, cardiac fluoroscopic ...
Lassman Andrew B - - 2005
BACKGROUND: Central hypoventilation and paroxysmal hypertension are uncommon complications of medullary infarction. To our knowledge, the combination of these autonomic complications of medullary stroke has not previously been reported. OBJECTIVE: To describe a patient who experienced life-threatening paroxysmal attacks of central apnea and vasomotor instability 3 months after medullary infarction, ...
Sumiyoshi Masataka - - 2005
BACKGROUND: A genetic correlation between Brugada syndrome (BS) and sinus node dysfunction (SND) has been proposed, although the clinical and electrophysiologic characteristics of this concomitant condition are unknown. METHODS AND RESULTS: The study comprised 5 patients with symptomatic BS (4 with spontaneous episodes of ventricular fibrillation (VF) and 1 with ...
Martinsen Brad J - - 2005
Cardiac progenitors of the splanchnic mesoderm (primary and secondary heart field), cardiac neural crest, and the proepicardium are the major embryonic contributors to chick heart development. Their contribution to cardiac development occurs with precise timing and regulation during such processes as primary heart tube fusion, cardiac looping and accretion, cardiac ...
Evdoridis Constantinos - - 2005
A 87-year-old woman was hospitalised because of a third-degree atrioventricular block. After the insertion of a temporary pacemaker lead through the left subclavian vein, she developed an ipsilateral pneumothorax. Although there were clinical and echocardiographic signs of cardiac tamponade after chest tube placement for pneumothorax, a second echocardiogram performed after ...
Brodie Eric E - - 2005
Visual line bisection was investigated in 26 sinistral and 24 dextral subjects as a function of hemispace, hand and scan direction. An ANOVA revealed significant main effects for hand preference, due to the mean bisection errors of dextral subjects being significantly leftward of those of sinistral subjects; for hand, due ...
Brown K J - - 2005
High-resolution analyses of a late Holocene core from Kettle Lake in North Dakota reveal coeval fluctuations in loss-on-ignition carbonate content, percentage of grass pollen, and charcoal flux. These oscillations are indicative of climate-fuel-fire cycles that have prevailed on the Northern Great Plains (NGP) for most of the late Holocene. High ...
Fabijanić Damir - - 2005
In a 62-year-old man with permanent atrial fibrillation and recurrent stroke, a large right atrial thrombus attached to a permanent pacemaker lead was incidentally identified by transesophageal echocardiography. Surgical treatment, recommended because of the large dimensions of the mass, was refused by the patient, and thrombus was successfully dissolved by ...
Guenoun Maxime - - 2005
BACKGROUND: Patients in permanent atrial fibrillation treated for heart failure and ventricular asynchrony can be implanted with conventional dual chamber pacemakers (DDD) pacemakers used in the biventricular mode. The left ventricular lead is connected to the atrial channel. CASE REPORT: We report the case of a patient who developed ventriculo-ventricular ...
Balashov V P - - 2005
Complex electrophysiological study of the effects of quaternidine carried out on intact hearts from cats, myocardial fragments from rats, and single ionic channels of large edible snail showed that quaternidine demonstrates properties of class 1B antiarrhythmic drug according to Vaughan-Williams nomenclature. This agent did not suppress nomotopic pacemaker automaticity, did ...
Sweeney Michael O - - 2005
BACKGROUND: Prolonged QRS duration (QRSd) is an important prognostic indicator for death and heart failure hospitalization in patients with systolic heart failure. The relationship of baseline QRSd to death and heart failure hospitalization in patients with sinus node dysfunction who require pacemaker therapy is unknown. METHODS AND RESULTS: Baseline QRSd ...
Namavar-Jahromi Bahia - - 2005
Although the occurrence of pure gonadal dysgenesis PGD is usually sporadic and nonfamilial, here we present 3 sisters with 46, XX PGD, who are born from a first cousin marriage. Review of their family pedigree is compatible with autosomal recessive inheritance. Surprisingly, 2 of these sisters developed ovarian tumors. Both ...
Kaspera Rüdiger - - 2005
Selective transformations of limonene by asco- and basidiomycetes were investigated. On the shake flask scale, Penicillium citrinum hydrated R-(+)-limonene to a-terpineol [83% regioselectivity (rs), more than 80 mg l(-1) product yield], and Gongronella butleri catalysed the terminal oxidation to yield perillyl alcohol (60% rs, 16 mg l(-1)). On the laboratory ...
Kaushik Prashant - - 2005
OBJECTIVE: To report a case of Miller Fisher syndrome (MFS), a variant of Guillain-Barre syndrome (GBS) necessitating the placement of a permanent cardiac pacemaker in a patient on tacrolimus after a cadaveric orthotopic liver transplantation. CASE SUMMARY: A 46-year-old African American male, who had been receiving tacrolimus 4 mg/day orally ...
Gregoratos Gabriel - - 2005
Each year, pacemaker therapy is prescribed to approximately 900,000 persons worldwide. Current pacemaker devices treat bradyarrhythmias and tachyarrhythmias and, in some cases, are combined with implantable defibrillators. In older patients, devices that maintain synchrony between atria and ventricles are preferred because they maintain the increased contribution of atrial contraction to ...
Bartsch C - - 2005
AIM: The hypothesis was that there is more undetected dysfunction of implanted pacemaker systems than that detected and corrected. This prompted a research project (sponsored by the German Research Foundation) to detect pacemaker abnormalities and evaluate their complications for patients, thus, proving or disproving the hypothesis. METHODS AND RESULTS: Four ...
Trehan Vijay - - 2005
Right ventricular perforation secondary to temporary pacemaker lead, resulting in cardiac tamponade, is a rare but life-threatening complication. Surgery is usually the definitive management described for such cases. We describe successful sealing of such a perforation by percutaneous instillation of cyanoacrylate glue, through a guiding catheter in the pericardial sac ...
Brignole Michele - - 2005
"Neurally-mediated (reflex) syncope" refers to a reflex response that, when triggered, gives rise to vasodilation and/or bradycardia; however, the contribution of each of these two factors to systemic hypotension and cerebral hypoperfusion may differ considerably. The initial evaluation may lead to a certain diagnosis in the case of classical vasovagal ...
Husted T L - - 2005
INTRODUCTION: Left laparoscopic donor nephrectomy (LDN) is preferred over right LDN due to technical ease. The purpose of this study was to compare results between right and left LDN and thereby determine whether substantial experience with right LDN can provide results equivalent to left LDN. METHODS: All LDN from 2000 ...
Singh Gagandeep - - 2005
We describe a patient in whom the only electrographic manifestation of a complex partial seizure recorded by video-EEG telemetry was periodic lateralized epileptiform discharges (PLEDs) with a left anterior temporal emphasis. The abnormality, which persisted throughout the whole recorded seizure, lends support to the claim that PLEDs can be an ...
Holden Arun V - - 2005
Static magnetic fields induce flow potentials in arterial flows in and around the heart, that have been detected as distortions in the ECG. The resultant currents flowing through the myocardium could alter the rate or rhythm of the heart. No such changes have been seen in animal experiments, or with ...
Poland Dennis C W - - 2005
Alpha1-acid glycoprotein (AGP) is a major acute-phase protein present in human plasma as well as in polymorphonuclear leukocytes (PMN). In this report, we show that PMN synthesize a specific glycoform of AGP, which is stored in the specific and azurophilic granules. Activation of PMN results in the rapid release of ...
Jerger Kristin K - - 2005
OBJECTIVE: To discriminate seizures from interictal dynamics based on multivariate synchrony measures, and to identify dynamics of a pre-seizure state. METHODS: A linear discriminator was constructed from two different measures of synchronization: cross-correlation and phase synchronization. We applied this discriminator to a sequence of seizures recorded from the intracranial EEG ...
Kasravi Babak - - 2005
As the number of coronary sinus (CS) lead implantations for cardiac resynchronization therapy increases so will the need for extraction of these leads. The safety of extraction of leads from the branches of the CS has not been reported. We reviewed our database of patients undergoing pacemaker lead extraction from ...
De Martino Giuseppe - - 2005
AIM: Biventricular implantation procedures require contrast venography of the coronary sinus. The aim of our study was to evaluate the efficacy and safety of contrast venography obtained by direct manual contrast injection into the guiding catheter, compared with venography obtained after occlusion of the coronary sinus by a Swan-Ganz catheter. ...
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